Six-wheel truck



A. C HRISTIANSON.

SIX-WHEEL TRUCK. APPLlcATloN m50 mm3 1920.

- 2 SHEETS-SHEET 2.

- FIG. a

FIG.4

I8 25 riff fl f' 'a 'Jr-25 in-; --J

mv QR l of the saine truck, partly in l:ANDREW eHRIs'rIANsoN, s'rEEr. can COMPANY, PENNSYLVANIA.

0F BUTLER, PENNSYLVANIA, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF Specification of Letters Patent.

ASSIGNOR TO STANDARD SIX-WHEEL TRUCK.

Patented Mar. '7, 1922.

Application led August 13, 1920.` Serial No. 403,185.

ToV all coito-m t may concern.'

Be it known that I, ANDREW CHRISTIAN- soN, a. citizen of the United States, and a resident ofButler, in the county otjButler and State of Pennsylvania, have invented a new and useful Improvement in Six-Wheel Trucks; and I do hereby declare the following to be a full, clear, and exact description thereof. l

My invention relates to six-wheel trucks for railway cars, and it has for its object to provide a truck ot thev character indicated which shall be simple in construction and of great strength and flexibility.

In the accompanying drawing, Fig. l is a plan view of a truck constructed in accordance with my invention ,i Fig. 2 is a side view elevation and partly in section; Fig. 3 is a transverse vertical sectional view taken substantially along the line 3-3, Fig.. l; and Fig. 4l is a sectional view taken centrally through the truck bolster substantially on the line 4 4, Fig. l.

The truck illustrated in the drawings is composed of'tront and rear sets oi'wheels 2,

. an intermediate set ot wheels 3, a truck bolster 4l and two pairs ot' articulated equalizer bars 5. The front and rear wheels 2 are carried inthe usual manner by axles 6 provided with journal boxes 7. Eachot the intermediate wheels 3 is carried by a short shaft 8 which is received in a journal box 9. Each of the journal boxes 9 is supported by a strap l0 which extends between the journal box 9 and one of the adjacent journal boxes 7, as shown in Fig. 2, and which is bolted to the underside of each of these journal boxes.

Each of the equalizer bars 5 consists, as best shown in Fig. 2, ot a framed structure that is secured to the top of its outer journal box 7 by mea-ns of bolts ll which also serve to attach the strap 10 to the under side of the journal box. The inner ends ot' the two equalizer bars at each side of the 'truck .are connected together by means ot a bolt l2 which also extends through openings in the triangular upstanding ears oi a bearing plate 13 which is bolted to the top ot the central journal box 9. Each of the equalizer bars 5 has a vertical extension or column 'l5 whichextends downward near the central journal box 9 and is bolted to the strap l0.

The truck bolster d consists ot two parallel members 16 which extend from side to side ytwo outer pairs of wheels,

of the truck and are connected by means of arches 17 which are themselves connected together by means oi a central web 18 that is provided, as shown in Fig. 4, with openings l9to receive the king-pin ot the truck, and with seats 2O to receive the center plate ot' the car bolster 2l, as shown in Fig. 3.

Fig. 3 also shows at 22 a. portion of the undert'rame of the car'and the manner in which the underirame is supported upon the truck bolster. It will be observed that all ot' the parts ot' the truck bolster 4t are formed of spaced top and bottom plates connected together to form a strong and rigid Structure.

'Ihe four outer corners of the truck bolster l are provided with seats 25 to receive springs 2G that are suspended from the lequalizer bars 5 by means of bolts 27 each ot which carries at its lower end a cup 28 that supports the lower end of the spring 26. Directly opposite to the springs 26 the members 1G ot the truck bolster are provided with ribs 29 which form vertical guideways engaging the columns l5 that extend downward from the equalizer bars 5, as indicated above.

It lwill be observed that all of the parts composing the trame ot my limproved truck are so constructed as to have great rigidity and strength, while at thesame time the central setA et wheels is flexibly mounted with respect to the'outer wheels and with respect to the truck bolster. This lexibilty is accomplished by supporting each of the central journal boxes from one of the outer journal boxes onl' this construction, as indicated above, being clearly shown in Fig. 2.

It will also be evident that various changes in the torni and arrangement of parts may be made without departing from my invention, and I therefore desire that no limitations be imposed upon my invention except such as are indicated in the appended claims.

` What I claim is:

l. A vtruck for railway cars comprising an intermediate pair of wheels, journal boxes for all of the said wheels, and a'supporting strap extending between each oi the said intermediate journal boxes to one only ot' the said outer journal boxes.

2. A truck for railway cars comprisingI two outer pairs ot' wheels, an intermediate pair ot wheels, journal boxes for all of the Y journal boxes,

Y jtruck, andy a pivot member said wheels, two pairs of equalizer bars, one pair being disposed at each side ofthe truck, each o1l the equalizer bars being secured to the top of one of the outer journal boxes and being pvotally secured to the adjacent equalizer bar above one of the intermediate abearing plate secured to the top of the' said intermediate journal box and supporting the joined bars, and means for pivotally securing said bars to saidrbearin'g plates. l

3; A truck for railway cars comprising two outer pairs of wheels, an intermediate pair ofwheels,jou'rnal boxes'for all of' the said wheels, a bearing-plate secured to the top of each ofthe intermediate journal boxes and having upstanding ears, two pairs' of equalizerV bars, the equalizer bars composing` each pair beingsecured to the outer journal 'boxesat one side of the truck and having their inner ends overlapping and resting upon thev said bearing plate on the intermediate journal kbox at the same side of the extending through the said overlapping ends of the equalizer bars and through the said upstandingl ears of the said bearing plate.

4k A truck for railway cars comprising two outer sets of wheels, journal boxes for all of the said wheels, two pairs of' equalizer bars, the equalizer barscomposing each pair'being Y secured at their outer ends upon the outer 'of said equalizer journalvboxesat one side of the truck and hz'ivin'gtheir inner ends pivotally secured tothe intermediate journal box at the same side of the truck, a column extending downward from each bars adjacent to the intermediate journal boxes, a truck` bolster and a single guideway formed at each of the four corners of said bolster and connecting Vthe adjacent column.

ends of said equalizerV of wheels, an intermediate sety 5. A truck for railway cars comprising a bolster Vcomposed of two .spaced parallel portions extending from side to side of the truck, means for connecting the said parallel portionsrigidly together, spring-seats disposed at the ends of the said parallel portions, springs received in said seats and means for suspending the said springs.

6.A A truck for railway cars comprising two outer sets of wheels, of wheels, journal boxes wheels, a pair 'of equalizer bars at each side of the truck, the equalizer bars composing each pair being secured'at their outerpends upon the outer journalboxes at one" side of the truck andl having their inner ends pivotally secured together andv restngupon the intermediate journal box at' the .same'side of the truck, columns extending downwardly an intermediate set for all of the said from the' said equalizerbars adjacenty tothe Y intermediate journal boxes, straps secured to the under side of each of the outer journal boxes and to the said columns, a spring' sus-V pended from each of: the said equalizerv bars, and a bolster carried by the said springs, the said bolster being composed of spaced paral-V lel portionsextending from side to side Vof springs. Y Y

7. A truck for railway cars comprising two outer sets of wheels, an intermediate set ofV wheels, side frames, a truck bolster, springs supporting the said` bolster, and

means extending through the said springs 7 0 the truck and having seats at the endsV of the said parallel portions for receiving the said 

